Suppose that the number of crates of an agricultural product is given by 
, where x is the number of hours of and y is the number of acres of the crop. Find the marginal productivity of the number of hours of labor when 
and 
.
Definitions:
Ulrich Beck
A prominent sociologist known for his work on risk society, individualization, and reflexive modernization.
Zygmunt Bauman
A sociologist known for his analyses of modernity, postmodernity, and consumerism, and for introducing the concept of "liquid modernity".
Multidimensional
Having or relating to multiple facets, aspects, or dimensions.
Benjamin Barber
An American political theorist known for his work on democracy, culture, and globalization, including the book "Jihad vs. McWorld."
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